define these.
weathering-
physical weathering-
chemical weathering-
abrasion-
oxidation-
acid precipitation-
erosion-
deposition-
delta-
marsh-
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1.) Sun, rain, frost, and wind are breaking down even the most solid of the rocks into smaller bits before they are taken away. This process is termed as weathering. It is the breakdown and decay of rocks
2.) physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. the process is sometimes assisted by water.
3.) Chemical weathering is caused by rain water reacting with the mineral grains in rocks to form new minerals (clays) and soluble salts. These reactions occur particularly when the water is slightly acidic.
4.) Abrasion: An abrasion or "excoriation" is a wearing away of the upper layer of skin as a result of applied friction force. In dentistry an "abrasion" is the wearing away of the tooth substance.
5.) Oxidation is a process in which a chemical substance changes because of the addition of oxygen. The reaction between magnesium metal and oxygen involves the oxidation of magnesium. When exposed to oxygen, silicon undergoes oxidation and forms silicon dioxide.
6.)Acid rain, or acid deposition, is a broad term that includes any form of precipitation with acidic components, such as sulfuric or nitric acid that fall to the ground from the atmosphere in wet or dry forms. This can include rain, snow, fog, hail or even dust that is acidic.
7.) In earth science, erosion is the action of surface processes that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location. Erosion is distinct from weathering which involves no movement.
8.) a testifying especially before a court was sworn in before giving his deposition. b : declaration specifically, law : testimony taken down in writing under oath took depositions from the witnesses.
9.) A delta is an area of low, flat land shaped like a triangle, where a river splits and spreads out into several branches before entering the sea.
10.) A marsh is a type of wetland, an area of land where water covers ground for long periods of time. Unlike swamps, which are dominated by trees, marshes are usually treeless and dominated by grasses and other herbaceous plants.
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